| 魔芋葡甘聚糖的辐照降解研究 |
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| 引用本文： | 徐振林,孙远明,丁金龙,沈玉栋,庞杰,王弘,肖治理,谌国莲.魔芋葡甘聚糖的辐照降解研究[J].农产品加工．学刊,2006(10):27-29,46. |
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| 作者姓名： | 徐振林 孙远明 丁金龙 沈玉栋 庞杰 王弘 肖治理 谌国莲 |
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| 作者单位： | 1. 华南农业大学,食品学院广州,510642
2. 广州王老吉药业股份有限公司,广州,510060 |
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| 摘 要： | 研究了不同剂量的Coγ-射线对魔芋葡甘聚糖(KGM)的辐照降解作用。黏度测定结果表明,辐照后KGM60的黏度随着辐照剂量的增加而显著下降;凝胶渗透色谱(GPC)结果显示,KGM分子量随着辐照剂量的增加而下降,经5.0kGy和100.0kGy辐照后,KGM的重均分子量Mw从未辐照的4.81×105下降到3.70×105和3.98×104;热重分析(TG)结果表明,辐照并未对KGM的热性能造成显著影响,100.0kGy辐照后,KGM的热分解温度只比对照下降20℃。对KGM辐照前后的酶解结果表明,辐照提高了KGM对β-葡甘聚糖酶的敏感性,从一定程度上促进了酶解效果。
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| 关 键 词： | 魔芋葡甘聚糖 γ-辐照 β-葡甘聚糖酶 |
| 文章编号： | 1671-9646（2006）10-0027-03 |
| 收稿时间： | 2006-08-22 |
| 修稿时间： | 2006年8月22日 |
Study on Degradation of Konjac Glucomannan by Gamma Irradiation |
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| Xu Zhenlin,Sun Yuanming,Ding Jinlong,Shen Yudong,Pang Jie,Wang Hong,Xiao Zhili,Chen Guolian.Study on Degradation of Konjac Glucomannan by Gamma Irradiation[J].Nongchanpin Jlagong.Xuekan,2006(10):27-29,46. |
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| Authors: | Xu Zhenlin Sun Yuanming Ding Jinlong Shen Yudong Pang Jie Wang Hong Xiao Zhili Chen Guolian |
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| Abstract: | The degradation of konjac glucomannan by different doses of gamma irradiation was studied in this paper.The viscosity of KGM decreased continuously with the increase of irradiation doses.Gel permeation chromatography(GPC)indicated that the weight-average molecular weight(Mw)of KGM decreased from 4.81×105 to 3.70×105 and 3.98×104 of 5.0 kGy and 100.0 kGy,respectively.Thermogravimet analysis(TG)indicated that irradiation does not affect the thermal property of KGM remarkably.The sensitivity of KGM to β-mannanase increased in a certain degree after irradiated by gamma irradiation. |
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| Keywords: | konjac glucomannan gamma irradiation β-mannanase |
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